Dana uses a rope to pull a box that weighs 300 N across a level surface with constant velocity.The rope makes an angle of 30 $\degree$ above the horizontal and the tension in the rope is 100 N.What is the coefficient of friction?
A)0.35
B)0.29
C)0.17
D)0.20

Question

Quizplus · Accepted Answer

The coefficient of friction is given by the equation:$$μ = \frac{F_f}{N}$$where:* μ is the coefficient of friction* F_f is the force of friction* N is the normal forceIn this problem, the force of friction is equal to the tension in the rope, which is 100 N. The normal force is equal to the weight of the box, which is 300 N. Therefore, the coefficient of friction is:$$μ = \frac{100 N}{300 N} = 0.33$$The closest answer choice to 0.33 is A) 0.35.

Dana Uses a Rope to Pull a Box That Weighs °\degree°

Dana Uses a Rope to Pull a Box That Weighs $\degree$